Density and Liquids. The diagram below shows liquid layers that result from mixing vegetable oil, honey, & water. Click on the correct label next to each part of the diagram to show which substance would end up in which layer. ( ()= the circles to select )

Vegetable Oil Honey Water
Layer 1 () () ()
Layer 2 () () ()
Layer 3 () () ()

The fertilized egg  begins to develop into a hollow ball of cells called the blastocyst. 

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.